from unittest import TestCase
from kuai.inner import *

atoms = [Atom("C"), Atom("C"), Atom("C"), Atom("C")]
bonds = [Bond(atoms[0], atoms[1]), \
         Bond(atoms[1], atoms[2]), \
         Bond(atoms[2], atoms[3]), \
         Bond(atoms[3], atoms[0]), ]

class TestInner(TestCase):
    def testAtomPair13(self):
        self.assertEqual(len(list_atom_pair13(mol)), 2)
